'a thousand blossom cherry trees') is a 2011 song written by Japanese music producer Kurousa-P (黒うさP), utilizing the Vocaloid 2 voicebank Hatsune Miku.

First posted onto video sharing site Niconico on 17 September 2011 (2011-09-17), the song quickly became viral and inspired multiple cover versions and other derivative works.

The accompanying music video, illustrated by Ittomaru (一斗まる), similarly draws inspiration from the same time period, and features Hatsune Miku in a military-esque uniform.

The novel is set in a dystopian world where the Taishō era continued for a hundred years and features Hatsune Miku as the main protagonist.

[11] The same month, Niconico hosted a musical based on the novel's storyline and featured AKB48 members Haruka Ishida, Maho Tomita, and Miori Ichikawa as well as actor Kazuki Kato.